QmlDesigner: crash fix

1000ms is too long. It was possible to close the designer
before the 1000ms finished.

100ms make it impossible to close the designer fast enough
to trigger the crash.

Change-Id: Ie12b406298350551551b36cb021b560eeeba7ecf
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

src/plugins/qmldesigner/components/propertyeditor/propertyeditor.cpp

@@ -825,7 +825,7 @@ void PropertyEditor::modelAttached(Model *model)
     resetView();
     if (!m_setupCompleted) {
         m_singleShotTimer->setSingleShot(true);
-        m_singleShotTimer->setInterval(1000);
+        m_singleShotTimer->setInterval(100);
         connect(m_singleShotTimer, SIGNAL(timeout()), this, SLOT(setupPanes()));
         m_singleShotTimer->start();
     }